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Full text of "Senecio lusitanicus (Asteraceae, Senecionae), a new combination for a species from Iberian Peninsula"

\3 Biodiversity 
^Heritage 
^^Library 

http://www.biodiversitylibrary.org/ 



Compositae newsletter. 

Columbus, Ohio :Dept. of Botany, Ohio State University, 1975- 
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Comp. Newsl. 47. 2009 1 g 



Senecio lusitanicus (Asteraceae, Senecioneae), 
a new combination for a species from 

Iberian Peninsula 

Rafael Perez-Romero, Carmen Perez-Morales, 

r 

■ Rosa M. Vale \< i \ B w<\<\ u \ & Angel Penas Merino 

Departamcnto de Biodiversidad y Gestion Ambiental (Area de Botanica) 
Facultad de Ciencias Biologicas y Ambientales, Universidad de Leon 

Campus de Vegazana s/n, 24071 Leon, Spain 

rperr@unileon,es 



Abstract 

A new combination Senecio lusitanicus (Coin.) R, Perez-Romero is proposed for 
a taxon previously treated as a subspecies ofS. doronicum (L,) L. or S. lagascanus 
DC It is endemic to the west of the Iberian Peninsula. 



Introduction 

A study of morphological and palynological characters of Senecio sect. Crociseris 
(Asteraceae, Senecioneae) from Iberian Peninsula (Perez Romero 2007, unpubl.), 
reveals that the following new combination is necessary: 

Senecio lusitanicus (Colt.) R. Perez-Romero, comb, et stat. nov. 

Basionyrn: Senecio doronicum (L.) L. subsp. lusitanicus Cout,, FL PorL: 641 
(1913), Synonym: Senecio lagascanus DC. subsp. lusitanicus (Coi i .) P Silva, FL 
Voy. Portugal Link (Hist. Desensolv. Cienc. Portugal, 2): 955 (1987). 

Perbira Coutinho (1913) described a new subspecies: S. donmicum subsp. 
lusitanicus Cout. It is characterized by subentire leaves, small capitula, 
supplementary bracts which are smaller than involucral bracts, and lower part of 
stems arachnoid-lanate (Amaral Franco 1984). In contrast. Crater & Walters 
( 1976) recognized that & doronicum subsp. lusitanicus was probably referable to 
5. lagascanus and Pinto da Silva (1987) regarded this taxon as a subspecies of S. 
lagascanus. Detailed morphological study (Perez Romero 2007. unpubl.) shows 
that S. lusitanicus is morphologically different from other species (Table 1 ). 

A limited number of pollen morphology studies have pre\ iously been undertaken 
for the genus Senecio (Stix 1960, Tormo et al. 1985, Dn / 1987. Blanca et al. 
1 988, 1 991, Otieno & Tadesse 1992, Hodalova & Martoni i 1 995, Perez Romero 



20 



Comp. Newsl. 47. 2009 



et al, 2003). As a result of our study (Perez Romero 2007, unpubL), we conclude 
that pollen oi\S. lusitanicus is clearly distinct in size and ornamentation from the 
related species of Senecio (Table 1; Figs. IB, C). 

We consider the differences between the taxa studied important enough to elevate 
the taxonomic status (Table 1 }. 



Table 1. Comparison between Senecio lusitanicus and related species. 



Characters 



S* doronicum S. lagascanus S. lusitanicus 



Plant height 



Leaf base 



Indumentum 



Trichomas 



Length of 
involucral bracts 

Length of ligulate 
flowers 



Pollen size: polar 
axis (in equatorial 
view) 

m 

Pollen size: 
equatorial axis (in 
equatorial view) 

Ornamentation 
of pollen grains 
(SEM) 



30-60 (27-73) em 24-60 ( 1 8-68) cm 14-23 (50) cm 



gradually narrowed 
into the petiole 

sparsely hairy, more 
abundant lower 
part of stems and 
es 

10 or more short 
or elongated 
cylindrical cells and 
a long (< 300 prn), 
curled apical cell 

10-13 mm 

22-37 mm 



Length of pappus 6-9 mm 



37-40,5 

(33,5-45,5) pm 
(Fig. 1C) 

35,5-40 
(30-44,5) urn 
(Fig. 1C) 

Perforate-fossulate- 
reticulate 



gradually 
narrowed into the 
petiole 

sparsely hairy, 
more abundant 
lower part of 
stems and petioles 

8-10 short or 
elongated 
cylindrical cells 
and a long (> 300 
pm), curled apical 
cell 



15-25 mm 

5,5-8 mm 

30,5-34 
(27,5-36) pm 

28,5-34 
(25,5-37) jum 

Perforate- 
fossulate- 
reticulate 



truncate to 
attenuate 

arachnoid-lanate, 
more abundant 
lower part of stems 
and petioles 

8-10 short or 
elonuated 
cylindrical cells 
and a long (> 500 
pm), curled apical 
cell (Fig, I A) 



6,5-10,5 (12) mm 8-10 mm 



13-19,5 mm 
5-6,5 mm 

31-35 

(28-38) pm 
(Fig. IB) 

30-32 
(27-35) urn 
(Fig. IB) 

Fossulate, little 
perforate 



Comp. Newsl. 47, 2009 



21 




if 
*i 



«N 



# 4 i * ' : * • * 




•s 4 






B 







Fig I. 

A. Uniseriate trichome of 5. lushanicus. 
B. Pollen grain of 5. hisitanicm (equatorial view, LM). 
C\ Pollen grain of 5. cknonicum (equatorial view, LM). 



5, lusitcmicus is endemic to the west of the Iberian Peninsula (Portugal; Fig. 2), on 
the other hand S. domnieutn is distributed in the north of Spain and 5- lagasccuuts 
in the middle north and east of Spain. 



22 



Comp. NewsL 47, 2009 




Fig, 2. 

Map of Iberian Peninsula: geographic distribution of S. iusitanicus ( ■ ) 



References 



Am aral Franco, J, do 1984. Nova Flora de Portugal vol II. Sociedade Astoria, 
Lisboa. 

Blanca, G., Gutrado, J. & A. T. Romero Garcia 1988. Palinologia de plantas 
endemicas del sureste de la Peninsula Iberiea. In: Civis Llovera, J. & M. 
F. Value Hhrnandez (eds.), Actus de Palinologia: 23-28. Universidad de 
Salamanca, Salamanca. 

Blanca, G., Salinas, M. J,, Diaz de la Guarma, C. & A, T. Romero Garcia 

1991 . Estudios palinologicos en la subfamilia Asteroideae (Compositae) en 
el Sureste de la Peninsula lberica, Acta Bat. Malac. 16(2): 491-508. 

Chater, A, O. & S. M. Walters 1976. Senecio L. In: Tutin, T. G., Heywood, 
V. FL Burges, N. A., Moore, D. M., Valentine, D. FL Walters, S. M. & 

I D. A. Wi-bb (eds.), Flora I uropaea^ vol. 4, pp. 191 205, Cambridge at the 
University Press, Cambridge. 

DIez, M. J. 1987. Asteraceae (Compositae). In: Valdes, El, Dii:/, M. J. & I. 
Fernandez (eds.)-, Atlas polimco de Andalucia OccidenfaL pp. 332-357. 
Institute de Desarrollo Regional, Universidad de Sevilla, Seville, 

Hodalova, L & P. Martonfi 1995. Pollen morphology in the Senecio nemorensis 
group (Compositae) from the Carpathians, Comp. NewsL 26: 61-70. 

Otieno, D- F. & M, Tadfsse 1992. Pollen morphological studies in Senecio 
(Compositae-Senecioneae) from Ethiopia. Comp. NewsL 20/21: 22-28. 



Comp.NewsI.47,2009 23 



Pereira CouTiMio, Ap X, P* 1913. Flora de Portugal (plantas vascularis) disposta 
em chares dicoiomicas. Rertrand, Paris. 

Perez, Romero, R. 2007. Andlisis morfologico, paiinologico y taxonomico de 
Senecio sec, Crociseris en la Peninsula Iberica. Uripubl. PhD dissertation. 
Universidad de Leon, Leon. 

Perez Romero, R,, Valencia Barrera, R. M., Perez Morales, C. & A, Penas 
Merino 2003. Morfologia polfnica de Senecio pyrenaicus L. (Asteraceae) 
en la Peninsula Iherica. Polen 13: 163-174. 

Pinto da Silva, A. R. 1 987. A Flora no Voyage en Portugal de Link. In: Hisioria 
e Desenvolvimento da Ciencia em Portugal, vol. 2. Academia das Ciencias, 
Lisboa, 

Stix, E, I960. Pollenmurphologische Untersuchungen an Conipositen, Gratia 
PalynoL 1:41-114. 

Tqrmo, R., Ubera, J. L. & E. Dominguez 1985. Contribution al estudio 
paiinologico del genero Senecio L. An. Asoc\ Palinol. Leng. Esp. 2: 
169-176. 



The following text is generated from uncorrected OCR. 
[Begin Page: Page 19] 

Comp. Newsl. 47, 2009 19 

Senecio lusitanicus (Asteraceae, Senecioneae), 

a new combination for a species from 

Iberian Peninsula 

Rafael Perez-Romero, Carmen Perez-Morales, 

Rosa M. Valencia Barrera & Angel Penas Merino 

Departamento de Biodiversidad y Gestion Ambiental (Area de Botanica) 

Facultad de Ciencias Biologicas y Ambientales, Universidad de Leon 

Campus de Vegazana s/n, 24071 Leon, Spain 

rperr(a unileon.es 

Abstract 

A new combination Senecio lusitanicus (Cour.) R. Perez-Romero is proposed for 
a taxon previously treated as a subspecies of 5. doronicum (L.) L. or S. lagascanus 
DC. It is endemic to the west of the Iberian Peninsula. 



Introduction 

A study of morphological and palynological characters of Senecio sect. Crociseris 
(Asteraceae, Senecioneae) from Iberian Peninsula (Perez Romero 2007, unpubl.), 
reveals that the following new combination is necessary: 

Senecio lusitanicus (Cout.) R. Perez-Romero, comb, et stat, nov. 

Basionym: Senecio doronicum (L.) L. subsp. lusitanicus Cout., F1 . Port.: 641 
(1913). Synonym: Senecio lagascanus DC. subsp. lusitanicus (Cout.) P. Silva, F1. 
Voy. Portugal Link (Hist. Desensolv. Cienc. Portugal, 2): 955 (1987). 

Pereira CouTiNHO (1913) described a new subspecies: S. doronicum subsp. 
lusitanicus Cout. It is characterized by subentire leaves, small capitula, 
supplementary bracts which are smaller than involucral bracts, and lower part of 
stems arachnoid-lanate (Amaral Franco 1984). In contrast, Chater & Walters 
(1976) recognized that S. doronicum subsp. lusitanicus was probably referable to 
S. lagascanus and Pinto da Silva (1 987) regarded this taxon as a subspecies of 5. 
lagascanus. Detailed morphological study (Perez Romero 2007, unpubl.) shows 
that S. lusitanicus is morphologically different from other species (Table I ). 

A limited number of pollen morphology studies have previously been undertaken 

for the genus Senecio (Stix I960, Tormo et al. 1 985, DiEZ 1 987. Blanca et al. 

1 988, 1 99 1 , Otieno & Tadesse 1 992, Hodalova & M artonfi 1 995. Perez Romero 



[Begin Page: Page 20] 



20 



Comp. Newsl. 47, 2009 

et al. 2003). As a result of our study (Perez Romero 2007, unpubl.), we conclude 
that pollen of 5". lusitcmicus is clearly distinct in size and ornamentation from the 
related species of Senecio (Table 1 ; Figs. IB, C). 

We consider the differences between the taxa studied important enough to elevate 
the taxonomic status (Table 1 ). 

Table 1 . Comparison between Senecio lusitanicus and related species. 

Characters 

S. doroniciim S. lagascanus S. lusitanicus 

Plant height 
Leaf base 

Indumentum 
Trichomes 

Length of 
involucral bracts 
Length of ligulate 
flowers 



Length of pappus 

Pollen size: polar 
axis (in equatorial 
view) 

Pollen size: 
equatorial axis (in 
equatorial view) 

Ornamentation 
of pollen grains 
(SEM) 

30-60 (27-73) cm 24-60 (18-68) cm 14-23 (50) cm 

gradually narrowed 
into the petiole 

sparsely hairy, more 
abundant lower 
part of stems and 
petioles 

1 or more short 
or elongated 
cylindrical cells and 



along (< 300 |im), 
curled apical cell 

10-13 mm 

22-37 mm 

6-9 mm 

37 A 0,5 

(33,5-45,5) A m 
(Fig. IC) 

35,5 A 
(30 A 4,5) |im 
(Fig. IC) 

Perforate-fossulate- 
reticulate 

gradually 
narrowed into the 
petiole 

sparsely hairy, 
more abundant 
lower part of 
stems and petioles 
8-10 short or 



elongated 
cylindrical cells 
and a long (> 300 
|im), curled apical 
cell 

1 5-25 mm 
5,5-8 mm 

30,5-34 
(27,5-36) A m 

28,5-34 
(25,5-37) A m 

Perforate- 
fossulate- 
reticulate 

truncate to 
attenuate 

arachnoid-lanate, 
more abundant 
lower part of stems 
and petioles 
8-10 short or 
elongated 



cylindrical cells 
and a long (> 500 
|im), curled apical 
cell (Fig. IA) 

6,5-10,5 (12) mm 8-10 mm 

13-19,5 mm 

5-6,5 mm 

31-35 
(28-38) A m 
(Fig. IB) 

30-32 
(27-35) |im 
(Fig. IB) 

Fossulate, little 
perforate 



[Begin Page: Page 21] 



Comp. Newsl. 47. 2009 



21 



■V, 



Figl. 



A. Uniseriate trichome of 5. lusitcmicus. 

B. Pollen grain of 5. lusitcmicus (equatorial view, LM). 

C. Pollen grain of 5". doronicum (equatorial view, LM). 

S. lusitanicus is endemic to the west of the Iberian Peninsula (Portugal; Fig. 2), on 
the other hand S. doronicum is distributed in the north of Spain and 5". lagascanus 
in the middle north and east of Spain. 



[Begin Page: Page 22] 



22 



Comp. Newsl. 47. 2009 



Fig. 2. 



Map of Iberian Peninsula: geographic distribution ofS. hisitcmiciis (+). 



References 

Amaral Franco, J. do 1984. Nova Flora de Portugal, vol. II. Sociedade Astoria, 
Lisboa. 

Blanca, G., Guirado, J. & A. T. Romero Garcia 1988. Palinologia de plantas 
endemicas del sureste de la Peninsula Iberica. In: Civis Llovera, J. & M. 
F. Valle Hernandez (eds.), Actas de Palinologia: 23-28. Universidad de 
Salamanca, Salamanca. 

Blanca, G., Salinas, M. J., Diaz de la Guardia, C. & A. T. Romero Garcia 

1 991 . Estudios palinologicos en la subfamilia Asteroideae (Compositae) en 
el Sureste de la Peninsula Iberica. Acta Bot. Malac. 16(2): 491-508. 

Chater, A. O. & S. M. Walters 1976. Senecio L. In: Tutin, T. G., Heywood, 
V. H., BuRGES, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & 
D. A. Webb (eds.). Flora Eiiropaea, vol. 4, pp. 191-205. Cambridge at the 
University Press, Cambridge. 

DiEZ, M. J. 1 987. Asteraceae (Compositae). In: Valdes, B., Dlez, M. J. & 1 . 
Fernandez (eds.). Atlas polinico de Andalucia Occidental, pp. 332-357. 
Instituto de Desarrollo Regional, Universidad de Sevilla, Sevilla. 

HoDALOVA, I. & P. Martonfi 1 995. Pollen morphology in the Senecio nemorensis 
group (Compositae) from the Carpathians. Comp. Newsl. 26: 61-70. 

Otieno, D. F. & M. Tadesse 1992. Pollen morphological studies in Senecio 



(Compositae-Senecioneae) from Ethiopia. Comp. Newsl. 20/21: 22-28. 



[Begin Page: Page 23] 

Comp. Newsl. 47, 2009 23 

Pereira Coutinho,A. X. P. 1913. Flora de Portugal (plantas vasculares) disposta 
em chaves dicotomicas. Bertrand, Paris. 

Perez Romero, R. 2007. Andlisis morfologico. palinologico y taxonomico de 
Senecio sec. Crociseris en la Peninsula Iberica. Unpubl. PhD dissertation. 
Universidad de Leon, Leon. 

Perez Romero, R., Valencia Barrera, R. M., Perez Morales, C. & A. Penas 
Merino 2003. Morfologia polinica de Senecio pyrenaicus L. (Asteraceae) 
en la Peninsula Iberica. Polen 13: 163-174. 

Pinto da Silva, A. R. 1 987. A Flora no Voyage en Portugal de Link. In: Historia 
e Desenvolvimento da Ciencia em Portugal, vol. 2. Academia das Ciencias, 
Lisboa. 

Stix, E. 1960. Pollenmorphologische Untersuchungen an Compositen. Grana 
Palynol. 1:41-114. 

ToRMO, R., Ubera, J. L. & E. Dominguez 1985. Contribucion al estudio 
palinologico del genero Senecio L. An. Asoc. Palinol. Leng. Esp. 2: 
169-176.